Shuttle.



J. NORTHROP.

SHUTTLE.

APPLICATION FILED MAY a. me.

Patented Feb. 19, 1918 are area were,

JONAS NORTERGP, OF HOIPEDALE, MASSACHUSETTS, ASSTGNOR T0 HOPEDALE MANU- IACTURING COMPANY, OF MILFORD, MASSACHUSETTS, A CORPORATION OF MASSA- CH'USETTS.

SHUTTLE.

Application filed May 6, 1916.

To, all whom it may concern.

Be it known that I. JONAS Non'rtrnor, a citizen of the United States, residing at Hopedale, in the county .of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Shuttles; and I do hereby declare the following to be a full, clear, and exact description of the invention. such as will enable others skilled in the art to which it 'appertains to make and use'the same.

The present invention relates to an improvement in self-threading shuttles for weft replenishing looms. and more particularly to an improvement in thread blocks for such shuttles.

The object of the invention is to produce a thread block of simple construction such that the operation of self-threading may be performed with certainty, and, after the thread has been placed in a deliverable position, dethreading will be rendered impossible. To the accomplishment of this object the invention consists in the improved thread block for self-threading shuttles hereinafter described and particularly pointed out in the claims.

In the accompanying drawings'illustrats ing the preferred form of the invention, Figure 1 is a perspective view of a portion of the delivery end at a self-threading shuttle showing the application of the improved thread block thereto; Fig. 2 is a top plan of the delivery end of the shuttle and of the thread block; Fig. 3 is a front elevation of the parts shown in Fig. 2: Fig. 4 is a front elevation of the thread block Fig. 5 is an elevation of the outer or delivery end of the thread block; Fig. 6 is an elevation ofthe inner or inlet end of the thread block; and Fig. 7 is a bottom plan of the thread block.

The self-threading shuttle illustrated in the drawings comprises a shuttle body 10 provided with a central opening or chamber 11 for the reception of the bobbin or filling carrier. In the front wall of the shuttle is formed the delivery eye 12, wear pins 13 being disposed at each side of the delivery eye to pre. vent the filling from wearing away the wood of the shuttle. The thread or filling is led from the bobbin chamber 11, out through the delivery 'eye 12, by means of the thread block generally indicated at 15. The thread block is formed of a single casting and is received into a recess formed in the Patented Feb, 19, 1918,

Serial No. 95,9Qd.

delivery end of the shuttle, being held in place therein by means of a bolt 16 passing through a hole 17, in the thread block, which registers with holes in the shuttle body.

As the thread is fed from the bobbin chamber out through the delivery eye, it

Y passes through a thread passage 19 formed the loom after the weft replenishing operation, the thread encounters a cover 22 projecting rearwardly from. the top of the front wall 23 of the thread block toward the rear wall 24:, and being separated therefrom by a very narrow inlet or passageway 25 which gives into the thread passage 19. The top surface of the cover 22 slopesdownwardly toward the rear wall 24: of the thread block, so that, as the thread is drawn against it on the first pick of the shuttle after the replenishing operation, the thread is deflected downwardly through the inlet 25 into the inner end of the thread passage. On the top outer end of the front wall 23 of the thread block is formed a tieak 27 which overhangs the outer end of the thread passage 19. Projecting downwardly from the beak 27 is a horn 30 which slopes somewhat inwardly. The function of this horn 30 is to deflect the thread into the-delivery eye passage 28. It will be observed that the rear side 31 of the horn 30-constitutes a part of the front wall of the thread passage 19. The bottom end 32 of the horn 30 is separated from the surface 18 of the slfuttle body by a very narrow slit 34 which permits the'thread to be drawn into the delivery eye passage, but is so situated as to prevent its egress therefrom. On the top outer end of the rear wall 2 is formeda shield 36 which extends forwardly and overlaps the beak 27. The inner end of the shield 36 is provided with a forwardly, inwardly, and downwardly extending portion 37 which serves as a dethreading preve'nter or guard. This guard 37 operates to prevent the dethreading of thethread block in case the thread is not deflected into the delivery eye'passage on the first return pick of the shuttle after replenishment. The first return pick is the first pick of the shuttle toward the replenishing side of the loom after the replenishing operation. If on this pick, the thread is not fedfrom the delivery eye. but leads inwardly fromthe outer end of the threadpassage over the beak to the selvage at the side of the cloth farthest from the replenishing mechanism, the thread will draw against the guard 37 and thereby be prevented from being deflected over the tip of the beak. A felt pad 29 located at the entrance to the thread passage 19, serves as a tension device to prevent the formation of 100 as as the thread is paid out,

n the first pick of the shuttle after replenishment, the thread draws down over the cover 22, through the inlet 25, into the inner end of the thread passage 19; then draws over the beak 27, under the shield 36, passing around the tip of the beak until it draws against the upper rear side of the horn 30, being delivered into thc'shed by way of the recessed portion 38 in the delivery end of the shuttle. On the first return pick of the shuttle the thread draws against the outer side 39 of the hornand is deflected thereby into the delivery eye passage 28 and against the guide pin 20. The thread is now in its ultimate delivery position. It will be observed that the bottom of the delivery eye is raised above the surface 18,

and is therefore aboye the slit 3% formed between the point 32 0 2 the horn and the adjacent surface 18 of the shuttle body. Consequently, the thread is prevented from passing under the horn once the shuttle has been completely threaded.

The shuttle is picked from side toside across the lay with considerable velocity and force, and is stopped very suddenly in either shuttle box at the end of each pick. This sudden stopping of the shuttle frequently causes loop or thrown forward over the delivery end of the shuttle, and often results in dethreading. In order to prevent dethreadin from this cause, the inner end of the shield 36 is provided with a curved portion 40 which, in conjunction with the guard 37, forms a,hook to catch the loop of thread and thereby prevent its escape from the thread block. Having thus described the invention, what is claimed is z- 1, A thread block for self-threading shut tles-having, in combination, a longitudinal thread passage, an inlet thereto, means for guiding the thread to the delivery eye of the shuttle, a beak overhanging theouter bight of thread being end of the passage, and a shield overlapping the beak provided with a guard for preventing dethreading of the look when the thread is drawn from the thread passage over the beak and inwardly against the guard.

2. A thr'eadblock for self-threading shuttles having,in combination, a thread passage, an "inlet to the "passage, means for directin g the thread ,from the passage to the delivery'eye' of the shuttle, a'beak overhanging the outer end of the passage, and a shield overlapping the beak provided with a forwardly and inwardly extending guard cooperating with the directing means to prevent dethreading of thethread block.-

3. A thread block for self-threading shuttles having, in combination, a thread passage, a cover for the inlet end of the passage extending from one side toward and near to the otherside in the direction of motion of the thread unwinding from the bobbin, a beak extending from the same side wall toward and near to the otherside wall, and a shield extending from the latter wall out over, the beak, the inner forward. end of said shield'bein'g curved so as to form a hook which cotSperates-with the beak to prevent dethreading.

4. A thread block for self-threading shuttleshaving, in combination, a thread passage, an inlet to the passage,-means for d1- recting I delivery eye of the shuttle, a beak overhang in the outer end of the passage, and a shield overlapping the a forwardly, inwardly, and downwardly extending guard coiiperating with the directing means to prevent dethreading of the thread block 1 comes to rest at the end of a pick. 1 6. A thread block for self-threading shuttles having, in combination, a'thread passage, an inlet to the passage, means for dithe thread from the passage to the p the thread from the'passageto the delivery eye of the shuttle,

beak provided with ination of loops or bights when a shuttle recting the thread from the passage to the delivery eye of the shuttle, a heak overhan ing the outer end of the passage, and a shield overlapping the beak provided with a fiownwardly extending guard at its inner enc coiiperating with the directing means to prevent dethreading of the thread block,

' JONAS NORTHROP. 

